Member, "Expert Panel on the Future of Food Biotechnology." Royal Society of Canada, 2000-1

Member, "Committee on the Scientific Basis for Predicting the Invasive Potential of Non-indigenous Plants & Plant Pests in the USA." National Academy of Sciences & National Research Council, USA. 1999-2001

Editorial & Advisory Boards

Present: Editor-in-Chief, Proceeding of the Royal Society of London Series B, Journal of Systematics and Evolution, New Phytologist, Trends in Ecology & Evolution

Past: Evolution, Philosophical Transactions of the Royal Society of London Series B., International Journal of Plant Sciences, Evolutionary Applications, Molecular Ecology, Journal of Ecology, Journal of Evolutionary Biology, Plant Species Biology, American Journal of Botany, Proceedings of the Royal Society of London Series B (Editor)